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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-6158
DTSTART:20201001T210000Z
DTEND:20201001T223000Z
DTSTAMP:20260415T005533Z
LAST-MODIFIED:20200928T141518Z
LOCATION:Zoom meeting(see Abstract ) Coffee and tea 3:45pm\, Talk 4:00
  PM
SUMMARY:"What we learn when we're careful: the power of Seismic Stella
 r Evolution" \, Astronomy Colloquium\, Meridith Joyce\, ANU
DESCRIPTION:Betelgeuse is closer than we thought\, but we're safe from
  its end-of-life explosion for at least the next ten thousand years. I
 n the meantime\, we see the future of the Sun unfold in real time thro
 ugh the dying breaths of T Ursae Minoris. Nearby\, Alpha Centauri A an
 d B offer rare insight into the inner workings of stellar convection--
 -an opportunity once afforded only by the Sun. And across the sky\, yo
 ung stars reveal their ages via their oscillation spectra. These are j
 ust a few of the things we have learned in the last 2 years thanks to 
 Gaia\, TESS\, and seismic stellar evolution: a modeling technique that
  exploits multi-timescale simulations of the evolution and structure o
 f stars. In this talk\, I will discuss the novel ways in which I combi
 ne precision stellar evolution calculations with seismic perturbations
  and a rigorous treatment of observational and theoretical uncertainti
 es to build predictive timelines of variable stars\, revise best estim
 ates for the fundamental parameters of our most important calibrators\
 , and conquer highly degenerate modeling problems to derive a more pre
 cise radius for Betelgeuse than can be obtained from interferometry.
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 n
\nZoom Link: 
\nhttps://us02web.zoom.us/j/88513896776?pwd=Y1JtRE1KZl
 lxWkFTamJBSGtGdm9yQT09
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\n      Meeting ID: 885 1389 6776
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\n      Passcode: 713070
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URL:https://www.physics.wisc.edu/events/?id=6158
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